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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Sameeh Jubran <sameehj@amazon.com>,
        Arthur Kiyanovski <akiyano@amazon.com>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 129/251] net: ena: fix: Free napi resources when ena_up() fails
Date:   Thu, 16 Jan 2020 12:34:38 -0500
Message-Id: <20200116173641.22137-89-sashal@kernel.org>
In-Reply-To: <20200116173641.22137-1-sashal@kernel.org>
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From: Sameeh Jubran <sameehj@amazon.com>

[ Upstream commit b287cdbd1cedfc9606682c6e02b58d00ff3a33ae ]

ena_up() calls ena_init_napi() but does not call ena_del_napi() in
case of failure. This causes a segmentation fault upon rmmod when
netif_napi_del() is called. Fix this bug by calling ena_del_napi()
before returning error from ena_up().

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 961f31c8356b..da21886609e3 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1702,6 +1702,7 @@ static int ena_up(struct ena_adapter *adapter)
 err_setup_tx:
 	ena_free_io_irq(adapter);
 err_req_irq:
+	ena_del_napi(adapter);
 
 	return rc;
 }
-- 
2.20.1